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Research Engineer / Scientist, Memory

Letta

Salary not specified
Sep 10, 2025
San Francisco, CA, USA
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At Letta, we’re building self-improving artificial intelligence: creating agents that continually learn from experience and adapt over time. We’re assembling a world-class team of researchers and engineers to solve AI’s hardest problem: making machines that can reason, remember, and learn the way humans do.

Requirements

  • Deep expertise in LLMs and retrieval
  • Track record of impactful research (breakthrough publications and/or open source contributions)
  • Ability to balance execution speed with empirical rigor
  • Real-world impact beyond pure academic work

Responsibilities

  • Defining the key abstractions of the LLM memory layer
  • Building memory architectures that support multiple memory types including temporal sequences, episodic experiences, semantic knowledge, and procedural skills
  • Researching memory sharing between multiple agents that enable effective multi-agent collaboration
  • Improving context management techniques that solve the long-context / context derailment problem
  • Running evaluations for measuring and improving memory for agents
  • Advance the field through open publishing of research through papers, technical reports, blog posts, and open-source code.

Other

  • Note that this role is in-person (no hybrid), 5 days a week in downtown San Francisco.
  • You want to maximize your impact: you want work on a small, incredibly talented team where every individual plays a huge role in the team's success.
  • You are fundamentally opposed to closed frontier AI that is controlled by a handful of billionaires and private tech companies.
  • You like stability, and get stressed out when there’s nobody telling you exactly what to do.
  • You want to work a 9-5, and value clear separation of work from life.